Pre-evaluation device and method for coal seam rock burst risk advanced drilling test

Abstract

The invention relates to the technical field of risk area evaluation of bursting liability in underground mining of coal mines, and discloses a pre-evaluation device and method for a coal seam rock burst risk advanced drilling test. The device comprises a drilling mechanism comprising a drill bit, a directing piece and a stabilizer connected in sequence, a measurement mechanism while drilling usedfor acquiring one or more of ground stress, surrounding rock strength, an electromagnetic radiation signal and a natural gamma signal, an in-situ measurement mechanism used for acquiring one or moreof a temperature curve, hole wall deformation degree and position, coal seam thickness, structure occurrence and a natural resistivity curve, and a directional coring mechanism used for acquiring a rock core; the stabilizer is detachably connected with a pipe column; the measurement mechanism while drilling is detachably connected with each of the pipe column and the stabilizer; the in-situ measurement mechanism is detachably connected with the pipe column; and the directional coring mechanism is detachably connected with the pipe column. According to the pre-evaluation device, accurate evaluation and determination of a bursting risk area provide basic measurement data for accurate pressure relief in advance before coal mining.

Description

technical field [0001] The invention relates to the technical field of assessment of rockburst tendency dangerous areas in underground mining of coal mines, in particular to a pre-evaluation device and method for advanced drilling measurement of rockburst hazards in coal seams. Background technique [0002] In recent years, with the continuous increase of coal mining depth, rock burst has become one of the main disasters restricting the safe mining of coal mines, and the degree of harm is increasing. Risk assessment of rock burst is an important method to prevent and avoid impact accidents. According to the time sequence relationship with mining work, impact risk assessment can be divided into pre-assessment and real-time assessment. The former is carried out before the mining work, and the latter is carried out during the mining process. [0003] Impact risk pre-evaluation refers to the use of theoretical analysis, numerical simulation or actual measurement methods to del...

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Problems solved by technology

[0005] The embodiment of the present invention provides a pre-evaluation device and method for advanced drilling measurement of coal seam rock burst risk, which is used to solve or partially solve the problem that the existing coal seam rock burst risk pre-evaluation cannot quantitatively evaluate the impact risk of geological conditions and structural stress The question of degree of influence

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